diff --git a/docs/models/model-gateway.en.md b/docs/models/model-gateway.en.md
index 8ed49f50..1c0c71ea 100644
--- a/docs/models/model-gateway.en.md
+++ b/docs/models/model-gateway.en.md
@@ -81,7 +81,10 @@ browser-access marker never reach the supplier.
 
 The same pinned CLI also declares `structured-outputs-2025-12-15` and
 `thinking-display-updates-2026-08-18` when queries are created through Agent SDK 0.3.303 /
-ACP adapter 0.94.0. Both are included in the bounded whitelist. An upgrade must verify its
+ACP adapter 0.94.0, and `per-turn-control-2026-07-01` on its first request for
+`claude-haiku-5-5`. The pinned OpenCode 1.19.3 declares `thinking-binding-controls-2026-08-01`
+and `structured-outputs-2025-11-13` when it requests a Claude model through
+`@ai-sdk/anthropic`. All of these are included in the bounded whitelist. An upgrade must verify its
 observed protocol surface before extending the policy.
 
 | Method and path | Query | Behavior |
diff --git a/docs/models/model-gateway.md b/docs/models/model-gateway.md
index 21391b54..3462134c 100644
--- a/docs/models/model-gateway.md
+++ b/docs/models/model-gateway.md
@@ -53,7 +53,9 @@ Claude Code 2.1.303 的 Messages 兼容面如下；允许的 beta 标记由
 客户端诊断头、会话标识及 browser-access 标记不会转发到供应商。
 
 同一固定 CLI 通过 Agent SDK 0.3.303 / ACP adapter 0.94.0 创建查询时还会声明
-`structured-outputs-2025-12-15` 与 `thinking-display-updates-2026-08-18`；它们同样在受限白名单中。
+`structured-outputs-2025-12-15` 与 `thinking-display-updates-2026-08-18`，对 `claude-haiku-5-5` 的首个请求还会带
+`per-turn-control-2026-07-01`。固定的 OpenCode 1.19.3 经 `@ai-sdk/anthropic` 请求 Claude 模型时声明
+`thinking-binding-controls-2026-08-01` 与 `structured-outputs-2025-11-13`。它们同样在受限白名单中。
 升级版本仍须先验证实际协议面，不能按客户端传入内容自动放开。
 
 | 方法与路径 | 查询 | 行为 |
diff --git a/internal/modelgateway/anthropic.go b/internal/modelgateway/anthropic.go
index 456299ea..06e9f0c5 100644
--- a/internal/modelgateway/anthropic.go
+++ b/internal/modelgateway/anthropic.go
@@ -10,8 +10,9 @@ import (
 
 const anthropicVersion = "2023-06-01"
 
-// These protocol capabilities were observed with the pinned Claude 2.1.303 CLI.
-// A CLI upgrade must exercise its requests before extending this set.
+// These protocol capabilities were observed with the pinned Claude 2.1.303 CLI and, for
+// Claude models over Anthropic Messages, the pinned OpenCode 1.19.3 CLI. A CLI upgrade must
+// exercise its requests before extending this set.
 var claudeBetaHeaders = map[string]bool{
 	"claude-code-20250219":                     true,
 	"interleaved-thinking-2025-05-14":          true,
@@ -22,6 +23,9 @@ var claudeBetaHeaders = map[string]bool{
 	"effort-2025-11-24":                        true,
 	"structured-outputs-2025-12-15":            true,
 	"thinking-display-updates-2026-08-18":      true,
+	"per-turn-control-2026-07-01":              true,
+	"thinking-binding-controls-2026-08-01":     true,
+	"structured-outputs-2025-11-13":            true,
 }
 
 // runtimeModelRoute accepts only inference and the frozen binding's local model listing.
diff --git a/internal/modelgateway/anthropic_test.go b/internal/modelgateway/anthropic_test.go
index 87c4a902..9e2b883d 100644
--- a/internal/modelgateway/anthropic_test.go
+++ b/internal/modelgateway/anthropic_test.go
@@ -16,27 +16,35 @@ import (
 
 const pinnedClaudeBetas = "claude-code-20250219,interleaved-thinking-2025-05-14,thinking-token-count-2026-05-13,context-management-2025-06-27,prompt-caching-scope-2026-01-05,mid-conversation-tool-changes-2026-07-01,effort-2025-11-24"
 
-// Agent SDK query creation enables these additional capabilities on the same pinned native CLI.
-func TestPinnedClaudeAgentSDKCapabilities(t *testing.T) {
-	betas := pinnedClaudeBetas + ",structured-outputs-2025-12-15,thinking-display-updates-2026-08-18"
-	var calls atomic.Int64
-	service, _ := anthropicFixture(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		calls.Add(1)
-		if r.Header.Get("Anthropic-Beta") != betas || r.URL.RawQuery != "beta=true" {
-			t.Error("SDK capabilities changed while forwarding")
-		}
-		w.Header().Set("Content-Type", "application/json")
-		_, _ = io.WriteString(w, "{\"id\":\"m\",\"type\":\"message\",\"role\":\"assistant\",\"model\":\"fixture-model\",\"content\":[{\"type\":\"text\",\"text\":\"{}\"}],\"stop_reason\":\"end_turn\",\"usage\":{\"input_tokens\":3,\"output_tokens\":1}}")
-	}))
-	request := httptest.NewRequest(http.MethodPost, "/runtime/anthropic/v1/messages?beta=true", strings.NewReader("{\"model\":\"fixture-model\",\"messages\":[],\"max_tokens\":16}"))
-	request.Header.Set("Authorization", "Bearer "+strings.Repeat("r", 40))
-	request.Header.Set("Content-Type", "application/json")
-	request.Header.Set("Anthropic-Version", anthropicVersion)
-	request.Header.Set("Anthropic-Beta", betas)
-	response := httptest.NewRecorder()
-	service.ModelHandler(response, request)
-	if response.Code != 200 || calls.Load() != 1 {
-		t.Fatalf("pinned SDK request rejected: status=%d calls=%d", response.Code, calls.Load())
+// Each pinned CLI's exact first-request header for a Claude model is forwarded unchanged.
+func TestPinnedCLIClaudeModelBetas(t *testing.T) {
+	for name, betas := range map[string]string{
+		// Claude Code 2.1.303 through the pinned ACP adapter, with claude-haiku-5-5.
+		"claude": "interleaved-thinking-2025-05-14,thinking-token-count-2026-05-13,context-management-2025-06-27,prompt-caching-scope-2026-01-05,claude-code-20250219,per-turn-control-2026-07-01,mid-conversation-tool-changes-2026-07-01,effort-2025-11-24",
+		// OpenCode 1.19.3 through @ai-sdk/anthropic, with claude-haiku-5-5.
+		"opencode": "thinking-binding-controls-2026-08-01,structured-outputs-2025-11-13",
+	} {
+		t.Run(name, func(t *testing.T) {
+			var calls atomic.Int64
+			service, _ := anthropicFixture(t, http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+				calls.Add(1)
+				if r.Header.Get("Anthropic-Beta") != betas {
+					t.Error("pinned betas changed while forwarding")
+				}
+				w.Header().Set("Content-Type", "application/json")
+				_, _ = io.WriteString(w, "{\"id\":\"m\",\"type\":\"message\",\"role\":\"assistant\",\"model\":\"fixture-model\",\"content\":[{\"type\":\"text\",\"text\":\"{}\"}],\"stop_reason\":\"end_turn\",\"usage\":{\"input_tokens\":3,\"output_tokens\":1}}")
+			}))
+			request := httptest.NewRequest(http.MethodPost, "/runtime/anthropic/v1/messages", strings.NewReader("{\"model\":\"fixture-model\",\"messages\":[],\"max_tokens\":16}"))
+			request.Header.Set("X-Api-Key", strings.Repeat("r", 40))
+			request.Header.Set("Content-Type", "application/json")
+			request.Header.Set("Anthropic-Version", anthropicVersion)
+			request.Header.Set("Anthropic-Beta", betas)
+			response := httptest.NewRecorder()
+			service.ModelHandler(response, request)
+			if response.Code != 200 || calls.Load() != 1 {
+				t.Fatalf("pinned %s betas rejected: status=%d calls=%d", name, response.Code, calls.Load())
+			}
+		})
 	}
 }